Power - Triode (over 1000V 100W) ·Triode
Directly heated Philips industrial RF-generator power triode designed primarily for oscillator service. Rated for approximately 800 W plate dissipation and 7 kV plate voltage for substantial industrial high-frequency power generation.
TB52500 is a Philips industrial RF-generator oscillator triode. The supplied datasheet provides direct-filament data, RF/AF ratings, capacitances and high-power operating conditions.
General specifications
Properties common to every published source and operating point.
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
1 physical section, each with unique specifications.
Section 1
Maximum ratings kept separate from typical operating characteristics; fixed fields use published maximum-rating values where clearly applicable.
Source-dependent data
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 01
Published operating points and test conditions from this source.
Filament voltage
6.3 V
DirectlyHeated
Filament current
32.5 A
DirectlyHeated
Transconductance
5100 µS
Published
Maximum plate voltage
4000 V
Published limit
Plate capacitance
0.25 pF
Published
Grid capacitance
10.5 pF
Published
Grid-to-plate capacitance
6.2 pF
Published
Data set 02
Published operating points and test conditions from this source.
Cgk
9.1 pF
Cak
0.25 pF
Cga
6.2 pF
Data set 03
Published operating points and test conditions from this source.
Oscillator output power (Wo- Wi qp)s typical Wosc 2.73 kW
2.73 s
Oscillator output power (Wo- Wi qp)s typical Wosc 2.73 kW
Frequency for full ratings f max. 50 MHz
50 a
Frequency for full ratings f max. 50 MHz
Oscillator output power (Wo-Wteedb) Wosc 2.73 2.61 2.04 1.44 kW
1.44 s
Oscillator output power (Wo-Wteedb) Wosc 2.73 2.61 2.04 1.44 kW
Anode output power Wo 2840 2720 2160 1560 W
1560 A
Anode output power Wo 2840 2720 2160 1560 W
Anode efficiency ny 79 78 77 74 %
74 A
Anode efficiency ny 79 78 77 74 %
Oscillator efficiency Nosc 76 75 73 69 %
69 s
Oscillator efficiency Nosc 76 75 73 69 %
Anode current Iy max. 750 mA
750 A
Anode current Iy max. 750 mA
Anode input power Wia max. 4000
4000 A
Anode input power Wia max. 4000
Anode dissipation W, max. 800
800 A
Anode dissipation W, max. 800
Grid voltage —Vg max. 1250
1250 v
Grid voltage —Vg max. 1250
Grid current, on load Ig max. 300
300 a
Grid current, on load Ig max. 300
Grid dissipation Wg max. 150
150 s
Grid dissipation Wg max. 150
Grid circuit resistance Rg max. 10
10 s
Grid circuit resistance Rg max. 10
Cathode current, mean Iy max. 1.2
1.2 a
Cathode current, mean Iy max. 1.2
Envelope temperature Tenv max. 350
350 v
Envelope temperature Tenv max. 350
Seal temperature t max. 220
220 S
Seal temperature t max. 220
Oscillator output power (Wo—Wiooqn) Wosc 4.25 3.24 kW
3.24 s
Oscillator output power (Wo—Wiooqn) Wosc 4.25 3.24 kW
Anode output power Wo 4400 3375 W
3375 A
Anode output power Wo 4400 3375 W
Anode efficiency N4 77 75 %
75 A
Anode efficiency N4 77 75 %
Oscillator efficiency Nosc 74 72 %
72 s
Oscillator efficiency Nosc 74 72 %
Anode voltage Vg max. 7 kv
7 A
Anode voltage Vg max. 7 kv
Anode current Iy max. 1000 mA
1000 A
Anode current Iy max. 1000 mA
Anode -input power Wia max. 7000 W
7000 A
Anode -input power Wia max. 7000 W
Anode dissipation Wa max. See Fig. 2
2 A
Anode dissipation Wa max. See Fig. 2
Grid voltage -Vg max. 1250 V
1250 v
Grid voltage -Vg max. 1250 V
Grid current, on load Ig max. 300 mA
300 a
Grid current, on load Ig max. 300 mA
Grid dissipation Wg max. 150 W
150 s
Grid dissipation Wg max. 150 W
Grid circuit resistance Rg max. 10 k@
10 s
Grid circuit resistance Rg max. 10 k@
Cathode current, mean Ix max. 1.4 A
1.4 a
Cathode current, mean Ix max. 1.4 A
Envelope temperature Teny max. 350 ©°C
350 v
Envelope temperature Teny max. 350 ©°C
Seal temperature t max. 220 oC
220 S
Seal temperature t max. 220 oC
Oscillator output power (Wo—-Wseedb) Wose 2655 2451
2451 s
Oscillator output power (Wo—-Wseedb) Wose 2655 2451
Anode output power W, 2750 2550
2550 A
Anode output power W, 2750 2550
Oscillator efficiency Nosc 75 74
74 s
Oscillator efficiency Nosc 75 74
Anode voltage Va max. 6.3
6.3 A
Anode voltage Va max. 6.3
Anode current Iy max. 670
670 A
Anode current Iy max. 670
Frequency f 30 50 50 50 MHz
50 MHz
Frequency f 30 50 50 50 MHz
Anode voltage Va 6 5 4 3 kv
3 A
Anode voltage Va 6 5 4 3 kv
Anode current Iy 600 700 700 700 mA
700 A
Anode current Iy 600 700 700 700 mA
Anode input power Wia 3600 3500 2800 2100 W
2100 A
Anode input power Wia 3600 3500 2800 2100 W
Anode dissipation W, 760 780 640 540 W
540 A
Anode dissipation W, 760 780 640 540 W
Grid resistor Rg 3 2.5 2 1.5 k@
1.5 s
Grid resistor Rg 3 2.5 2 1.5 k@
Grid current, on load Ig 150 160 180 200 mA
200 a
Grid current, on load Ig 150 160 180 200 mA
Grid voltage, negative —Vg 450 400 360 300 Vv
300 v
Grid voltage, negative —Vg 450 400 360 300 Vv
Grid dissipation Wg 43 46 55 60 W
60 s
Grid dissipation Wg 43 46 55 60 W
Grid resistor dissipation WRg 67 64 65 60 W
60 s
Grid resistor dissipation WRg 67 64 65 60 W
Recommended grid blocking capacitor at high frequencies about 100 pF
100 k
Recommended grid blocking capacitor at high frequencies about 100 pF
Frequency for full ratings f up to 50 MHz
50 a
Frequency for full ratings f up to 50 MHz
RF power triode TBS/2500
2500 w
RF power triode TBS/2500
Frequency f 50 50 MHz
50 MHz
Frequency f 50 50 MHz
Anode voltage Va 6 5 kv
5 A
Anode voltage Va 6 5 kv
Anode current I, 950 900 mA
900 A
Anode current I, 950 900 mA
Anode input power Wia 5700 4500 W
4500 A
Anode input power Wia 5700 4500 W
Anode dissipation Wa 1300 1125 W
1125 A
Anode dissipation Wa 1300 1125 W
Grid resistor R 2.5 2 kQ
2 s
Grid resistor R 2.5 2 kQ
Grid current, on load 1y 190 190 mA
190 a
Grid current, on load 1y 190 190 mA
Grid voltage, negative Vg 475 380 V
380 v
Grid voltage, negative Vg 475 380 V
Grid dissipation Wo 63 63 W
63 s
Grid dissipation Wo 63 63 W
Grid resistor dissipation WRg 90 72 W
72 s
Grid resistor dissipation WRg 90 72 W
Anode voltage Va 5.4 4.5 kV
4.5 A
Anode voltage Va 5.4 4.5 kV
Anode current I, 530 600 mA
600 A
Anode current I, 530 600 mA
Anode input power Wia 3520 3320
3320 A
Anode input power Wia 3520 3320
Anode dissipation Wy 770 770
770 A
Anode dissipation Wy 770 770
Anode cfficiency Ny 78 77
77 A
Anode cfficiency Ny 78 77
Grid resistor Rg 3 2.5
2.5 s
Grid resistor Rg 3 2.5
Grid current, on load 1 140 150
150 a
Grid current, on load 1 140 150
Grid voltage, negative '§g 420 375
375 v
Grid voltage, negative '§g 420 375
Grid dissipation Wg 36 43
43 s
Grid dissipation Wg 36 43
Grid resistor dissipation WRg 59 56
56 s
Grid resistor dissipation WRg 59 56
Frequency for full ratings f up to 50
50 a
Frequency for full ratings f up to 50